I am in the process of converting my Mercruiser 5.7 to TBI.

I have 2 full complete systems.

One from a 94' Chevy Truck with ECM 16197427 with TBI and complete harness?
Second one is from a 92' Chevy Truck ECM 1227747 with TBI and complete harness?

This is where I am needing advice.

Which system should I go with.

I know the Newer one speaks faster than the other.

But here is what I am needing to do.
Run Open Loop system
Minimal sensors. Temp, EST, Knock, MAP, ESC, IAC

If anyone has any insight it would be greatly appreciated.

Thanks,
Chad